先前的相关研究表明，地球轨道周围也存在类似的尘埃空洞，其尘埃是来自小行星带的。
Earlier studies have shown that the Earth does the same thing with dust released from the asteroid belt.
模拟结果表明，尘埃环在海王星的轨道边上形成了一个空洞。
The results showed that a hole in the dust follows Neptune around in its orbit.
一项最新的模拟实验表明，围绕太阳系的尘埃盘中存在一个空洞，利用这个空洞可以向外星观察者发出信号，告诉它们这里有行星存在。
A hole in the dust disk surrounding our solar system would tell alien observers there are planets here, a new simulation shows.
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